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        <h1>Power Droid Programmable Power Supply</h1>
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<p>
The power supply specifically designed for testing mobile communications
devices.
</p>

<p>
This is a 66309D Dual Mobile Communications DC Source. It's designed to
measure the high-speed current draw transients that mobile devices can
induce.
</p>

<p>The is the primary instrument used to gather DUT power consumption
data. The Power Droid software samples the current draw every 130 ms,
approximately, during a data collection run.</p>

<p>
This power supply also provides a secondary output that is used to provide
charger voltage and USB power to the USB connected to the DUT.  This is
accomplished through the <a href="usbswitch.html">USB switch</a>, that is
output is connected to. Turning off this output electrically disconnects
the USB connection to the DUT, thus acting as an electronic switch
enabling more rapid test automation.  </p>

<p>The Power Droid software provides measurement APIs the exploit the
features of this device. Primarily we use it for high-speed current draw
data capture. It can also trigger on current peaks to take a "snapshot" of
high-power transients, and may also be used a voltmeter.</p>

<p>
A two-parameter (voltage and current measured) battery run-down test may
also be performed using a special external apparatus.</p>

<table>
  <caption>Documentation</caption>
  <tr>
    <td>Web Site</td>
    <td><a href="http://www.home.agilent.com/agilent/product.jspx?nid=-536902315.536881819.00&cc=US&lc=eng">http://www.home.agilent.com/agilent/product/</a></td>
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  <tr>
    <td>User's Guide</td>
    <td><a href="ag_66309D_5964-8184.pdf">ag_66309D_5964-8184.pdf</a></td>
  </tr>
</table>

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